/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.facebook.thrift.metrics.distribution;

import java.time.Duration;

public class DistributionConfig {
  public static final DistributionConfig ONE_MINUTE =
      new DistributionConfig(Duration.ofSeconds(10), 6, 2);
  public static final DistributionConfig TEN_MINUTE =
      new DistributionConfig(Duration.ofMinutes(2), 5, 2);
  public static final DistributionConfig ONE_HOUR =
      new DistributionConfig(Duration.ofMinutes(10), 6, 2);
  public static final DistributionConfig ALL_TIME =
      new DistributionConfig(Duration.ofSeconds(Long.MAX_VALUE), 1, 2);

  private final Duration duration;
  private final int count;
  private final int precision;

  public DistributionConfig(Duration duration, int count, int precision) {
    this.duration = duration;
    this.count = count;
    this.precision = precision;
  }

  public long chunkResetPeriodMs() {
    return duration.toMillis();
  }

  public int chunkCount() {
    return count;
  }

  public int significantDigitCount() {
    return precision;
  }
}
